[Term Entry] PHP Math Functions exp() #2269 (#2493)

* added exp.md in content\php\concepts\math-functions\terms\exp

* Changed E to e and removed (E^x^)

Co-authored-by: SSwiniarski <[email protected]>

* Removed Random Whitespaces in the metadata

* changed instances of E in exp.md to _e_ and changed the way that exp() is displayed

* removed random whitespaces in the pseudo syntax

* added a sentence to introduce the codebyte

* Update exp.md

* review edits

---------

Co-authored-by: SSwiniarski <[email protected]>
Co-authored-by: Caupolican Diaz <[email protected]>

Author: 3 people

content/php/concepts/math-functions/terms/exp/exp.md

@@ -0,0 +1,38 @@
+---
+Title: 'exp()'
+Description: 'Returns e raised to the power of x.'
+Subjects:
+  - 'Computer Science'
+  - 'Web Design'
+  - 'Web Development'
+Tags:
+  - 'Strings'
+  - 'Functions'
+CatalogContent:
+  - 'learn-php'
+  - 'paths/computer-science'
+---
+
+The **`exp()`** function returns _e_ raised to the power of x.
+
+## Syntax
+
+```pseudo
+exp($x)
+```
+
+- `$x`: Specifies the exponent that _e_ will be raised to.
+
+## Codebyte Example
+
+The following codebyte illustrates the use of the `exp()` function with a variety of arguments:
+
+```codebyte/php
+<?php
+  echo (exp(0)."\n");
+  echo (exp(1). "\n");
+  echo (exp(2). "\n");
+  echo (exp(4.8). "\n");
+  echo (exp(10). "\n");
+?>
+```